NATO HONORS TROOPS British Prime Minister David Cameron, U.S. Defense Secretary Leon E. Panetta, U.S. President Barack Obama and NATO Secretary General Anders Fogh Rasmussen observe a NATO color guard before a moment of silence honoring service members killed or wounded in Afghanistan at the NATO summit in Chicago, May 20, 2012. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 750371-C-LOT13-073.jpg Photo Gallery